<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        .slider{
            width: 500px;
            height: 100px;
            border: 1px solid #ccc;
            margin: 100px auto;
            position: relative;
            overflow: hidden;
        }
        .slider ul{
            width: 1000px;
            height: 100px;
            list-style-type: none;
            position: absolute;
            left: 0;
        }
        .slider ul li{
            width: 90px;
            height: 90px;
            background: purple;
            text-align: center;
            line-height: 90px;
            color: #fff;
            font-size: 30px;
            float: left;
            margin: 5px;
        }
    </style>
</head>
<body>
<input type="button" value="向左移动" class="btnLeft">
<input type="button" value="向右移动" class="btnRight">
<div class="slider">
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
    </ul>
</div>
</body>
</html>
<script src="js/jquery-1.10.1.js"></script>
<script>
    $(function () {
        var tags =  $(".slider ul").html();
        $(".slider ul").html(tags + tags);
        var left = 0;
        var result = 2;
        var timer = null;
        function speed() {
            left = left - result;
            if(left < -500){
                left = 0;
            }
            if(left > 0){
                left = -500;
            }
            $(".slider ul").css({
                "left" : left
            })
        }
        timer = setInterval(speed,30)
        $(".btnLeft").click(function () {
            clearInterval(timer);
            result = 2;
            timer = setInterval(speed,30);
        });
        $(".btnRight").click(function () {
            result = -2;
        })

        $(".slider").hover(function () {
            clearInterval(timer);
        },function () {
            timer = setInterval(speed,30);
        })
    })
</script>